This Monday at 8 pm/ET, CBS' The Big Bang Theory features not just a cameo by hottie astrophysicist George Smoot (one of the original proponents of the "Big Bang Theory"), but also one by Terminator's Summer Glau, who appears as herself and beguiles the boys as they trek to a San Diego sci-fi convention.

Here's a short snippet previewing the meeting of beauty and the geeks. I have to say, Sheldon makes a pretty good point about how SkyNet might seek to infiltrate humanity!

Crave TV scoop? E-mail senior editors Matt, Mickey and Tim at mega_scoop@tvguide.com.